Lifting-jack



(No Model.)

E. HUBER.

LIFTING JACK.

No. 362,085. Patented Maly 3, 1887.

IIIIIIIHN UNITED STATES PATENT OFFICE.

EDVARD HUBER, OF MARION, OHIO.

LlFTlNG-JACK.

SPECIFICATION forming part of Letters Patent No. 362,085, dated May 3,1887.

Application filed January Q9, 1887. Serial BT05225874. (No model.)

To all whom it may concern:

Be it known that I, EDWARD HUBER, of Marion7 in the county of Marion andState of Ohio,have invented certain new and useful Improvements inLifting-Jacks; and I do hereby declare the following to be a full,clear, and exact description ofthe invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

My invention relates to lifting-jacks.

The object of my present invention is to produce a lever lifting-jack ofsimple construction which will utilize a large proportion of the powerapplied to the lever and automatically lock the jack at any desiredpoint of elevated adjustment within its range.

Vith these objects in view my invention consists in certain features ofconstruction and combination of parts, that will be hereinafterdescribed, aud pointed outin the claim.

Referring to the drawings making a part of this specification, Figure 1is a side elevation of the lifting-jack. Fig. 2 is a front elevation ofthe device. Fig. 3 is a top plan view of the jack.

In Fig. l, A represents a vertical standard, which is made of properheight for the purpose, 'and to reduce weight is given an I form incross-section.4 The base F is preferebly extended to form a disk orplate, and its connection with the lower end of the standard A isstiffened by the bracket-fiangcs 7i.

The sliding standard or lifting-bar B is made of a form similar to thestandard A in its cross section. The bar B has a liftingtoe, E, made toproject at its lower end, and is provided with lugs or ears z', adaptedto slidingly engage the side edges of the upright standard A, similarprojections,k,being formed upon theupper front edges of the standard Ato hold the lifting-bar Bin proper sliding adjustment with thestationary upright standard A.

The front face of thelifting-barB has ratchetteeth D cut therein. Uponthe upper end of the standard A the lever C is pivoted, the handle beingextended a proper distance to provide sufficient leverage. The bolt c,upon 'which the lever C oscillates,is located in the side walls of thebifurcated en'd of the lever C loop ais pivotally secured between thesej aws o o at d, and from its assigned position will hang nearlyperpendicular topngage the teeth D ofthe lifting-bar B. A short distancebelow the pivot-bolt c the detent-loop b is pivotally secured to thestandard A, a sufficient spa'ce being allowed between the points ofconnection of the loops a and b and the standard A to permitaproperengagement of the transverse bar a of the loop a with theratchetteeth D.

The operation of this jack is evident, and when it is to be putin usethe toe E isinserted beneath the object to be elevated and thelever' Celevated to permit the loop a to engage a tooth in the rack D.Adepression of thelever C will raise the bar B a-limited distance, andthe relative position of the loops a and I) will permit the engagementof the loop b with the rack D, and thus retain the bar B in place. Acontinuation of this operation will give the desired degree ofelevation.

Heretoforejacks have been constructed with a lever that is pivoted upona bracket at the rear ofthe vertical standard; but this method ofconstruction fails to utilize the power applied,as mulch ofthe appliedpower is absorbed by frictional resistance between the sliding surfaceof the lifting-bar. I have by the construction of the forked or doublelever C and its combination with the pendent loop a overcome thisfriction to a great extent, and by shortening the distance between thepivotbolts c d great power can be derived and consequent ease ofoperation be secured.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, ism

The combination, with astandardsecured to a base, and a forked leverpivoted to said standard and carrying a bail,of a slide-bar providedwith an outwardly-projecting toe, said bar IOO being loosely seeuredtothe standard andpass- In testimony whereof I have signed this ingbetween the fork of the levenzmd provided specification in the presenceof two subscrib- With ratchet-teeth on its outer edge adapted ingwitnesses.`

to be engaged by the bail suspended from the 5 lever, and with groovedsides, guides, or pro- EDVARD HUBER. jections secured to the standardand engaging the grooved sides of the slidesloars7 and a bail Vitnesses:pivoted to said standard below the lever and M. V. PAYNE,

adapted to engage the teeth on the slide-bar7 1o substantially as setforth.

J. E. DAVIDs.

